#define READ 0
#define WRITE RW_MASK
#define READA RWA_MASK
-#define KERNEL_READ (READ|REQ_KERNEL)
-#define KERNEL_WRITE (WRITE|REQ_KERNEL)
#define READ_SYNC (READ | REQ_SYNC)
#define WRITE_SYNC (WRITE | REQ_SYNC | REQ_NOIDLE)
struct writeback_control;
struct iov_iter {
- const struct iovec *iov;
+ struct iov_iter_ops *ops;
+ unsigned long data;
unsigned long nr_segs;
size_t iov_offset;
size_t count;
};
-size_t iov_iter_copy_from_user_atomic(struct page *page,
- struct iov_iter *i, unsigned long offset, size_t bytes);
-size_t iov_iter_copy_from_user(struct page *page,
- struct iov_iter *i, unsigned long offset, size_t bytes);
-void iov_iter_advance(struct iov_iter *i, size_t bytes);
-int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes);
-size_t iov_iter_single_seg_count(const struct iov_iter *i);
+struct iov_iter_ops {
+ size_t (*ii_copy_to_user_atomic)(struct page *, struct iov_iter *,
+ unsigned long, size_t);
+ size_t (*ii_copy_to_user)(struct page *, struct iov_iter *,
+ unsigned long, size_t, int);
+ size_t (*ii_copy_from_user_atomic)(struct page *, struct iov_iter *,
+ unsigned long, size_t);
+ size_t (*ii_copy_from_user)(struct page *, struct iov_iter *,
+ unsigned long, size_t);
+ void (*ii_advance)(struct iov_iter *, size_t);
+ int (*ii_fault_in_readable)(struct iov_iter *, size_t);
+ size_t (*ii_single_seg_count)(const struct iov_iter *);
+ int (*ii_shorten)(struct iov_iter *, size_t);
+};
+
+static inline size_t iov_iter_copy_to_user_atomic(struct page *page,
+ struct iov_iter *i, unsigned long offset, size_t bytes)
+{
+ return i->ops->ii_copy_to_user_atomic(page, i, offset, bytes);
+}
+static inline size_t __iov_iter_copy_to_user(struct page *page,
+ struct iov_iter *i, unsigned long offset, size_t bytes)
+{
+ return i->ops->ii_copy_to_user(page, i, offset, bytes, 0);
+}
+static inline size_t iov_iter_copy_to_user(struct page *page,
+ struct iov_iter *i, unsigned long offset, size_t bytes)
+{
+ return i->ops->ii_copy_to_user(page, i, offset, bytes, 1);
+}
+static inline size_t iov_iter_copy_from_user_atomic(struct page *page,
+ struct iov_iter *i, unsigned long offset, size_t bytes)
+{
+ return i->ops->ii_copy_from_user_atomic(page, i, offset, bytes);
+}
+static inline size_t iov_iter_copy_from_user(struct page *page,
+ struct iov_iter *i, unsigned long offset, size_t bytes)
+{
+ return i->ops->ii_copy_from_user(page, i, offset, bytes);
+}
+static inline void iov_iter_advance(struct iov_iter *i, size_t bytes)
+{
+ return i->ops->ii_advance(i, bytes);
+}
+static inline int iov_iter_fault_in_readable(struct iov_iter *i, size_t bytes)
+{
+ return i->ops->ii_fault_in_readable(i, bytes);
+}
+static inline size_t iov_iter_single_seg_count(const struct iov_iter *i)
+{
+ return i->ops->ii_single_seg_count(i);
+}
+static inline int iov_iter_shorten(struct iov_iter *i, size_t count)
+{
+ return i->ops->ii_shorten(i, count);
+}
+
+#ifdef CONFIG_BLOCK
+extern struct iov_iter_ops ii_bvec_ops;
+
+struct bio_vec;
+static inline void iov_iter_init_bvec(struct iov_iter *i,
+ struct bio_vec *bvec,
+ unsigned long nr_segs,
+ size_t count, size_t written)
+{
+ i->ops = &ii_bvec_ops;
+ i->data = (unsigned long)bvec;
+ i->nr_segs = nr_segs;
+ i->iov_offset = 0;
+ i->count = count + written;
+
+ iov_iter_advance(i, written);
+}
+
+static inline int iov_iter_has_bvec(struct iov_iter *i)
+{
+ return i->ops == &ii_bvec_ops;
+}
+
+static inline struct bio_vec *iov_iter_bvec(struct iov_iter *i)
+{
+ BUG_ON(!iov_iter_has_bvec(i));
+ return (struct bio_vec *)i->data;
+}
+#endif
+
+extern struct iov_iter_ops ii_iovec_ops;
static inline void iov_iter_init(struct iov_iter *i,
const struct iovec *iov, unsigned long nr_segs,
size_t count, size_t written)
{
- i->iov = iov;
+ i->ops = &ii_iovec_ops;
+ i->data = (unsigned long)iov;
i->nr_segs = nr_segs;
i->iov_offset = 0;
i->count = count + written;
iov_iter_advance(i, written);
}
+static inline int iov_iter_has_iovec(struct iov_iter *i)
+{
+ return i->ops == &ii_iovec_ops;
+}
+
+static inline struct iovec *iov_iter_iovec(struct iov_iter *i)
+{
+ BUG_ON(!iov_iter_has_iovec(i));
+ return (struct iovec *)i->data;
+}
+
static inline size_t iov_iter_count(struct iov_iter *i)
{
return i->count;
void (*invalidatepage) (struct page *, unsigned int, unsigned int);
int (*releasepage) (struct page *, gfp_t);
void (*freepage)(struct page *);
- ssize_t (*direct_IO)(int, struct kiocb *, const struct iovec *iov,
- loff_t offset, unsigned long nr_segs);
+ ssize_t (*direct_IO)(int, struct kiocb *, struct iov_iter *iter,
+ loff_t offset);
int (*get_xip_mem)(struct address_space *, pgoff_t, int,
void **, unsigned long *);
/*
ssize_t (*read) (struct file *, char __user *, size_t, loff_t *);
ssize_t (*write) (struct file *, const char __user *, size_t, loff_t *);
ssize_t (*aio_read) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
+ ssize_t (*read_iter) (struct kiocb *, struct iov_iter *, loff_t);
ssize_t (*aio_write) (struct kiocb *, const struct iovec *, unsigned long, loff_t);
+ ssize_t (*write_iter) (struct kiocb *, struct iov_iter *, loff_t);
int (*iterate) (struct file *, struct dir_context *);
unsigned int (*poll) (struct file *, struct poll_table_struct *);
long (*unlocked_ioctl) (struct file *, unsigned int, unsigned long);
int (*show_fdinfo)(struct seq_file *m, struct file *f);
};
+static inline int file_readable(struct file *filp)
+{
+ return filp && (filp->f_op->read || filp->f_op->aio_read ||
+ filp->f_op->read_iter);
+}
+
+static inline int file_writable(struct file *filp)
+{
+ return filp && (filp->f_op->write || filp->f_op->aio_write ||
+ filp->f_op->write_iter);
+}
+
struct inode_operations {
struct dentry * (*lookup) (struct inode *,struct dentry *, unsigned int);
void * (*follow_link) (struct dentry *, struct nameidata *);
if (file)
atomic_inc(&file_inode(file)->i_writecount);
}
+static inline bool inode_is_open_for_write(const struct inode *inode)
+{
+ return atomic_read(&inode->i_writecount) > 0;
+}
+
#ifdef CONFIG_IMA
static inline void i_readcount_dec(struct inode *inode)
{
extern int generic_file_mmap(struct file *, struct vm_area_struct *);
extern int generic_file_readonly_mmap(struct file *, struct vm_area_struct *);
extern int generic_file_remap_pages(struct vm_area_struct *, unsigned long addr,
- unsigned long size, pgoff_t pgoff);
-extern int file_read_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size);
+ unsigned long size, pgoff_t pgoff);
+extern int file_read_iter_actor(read_descriptor_t *desc, struct page *page,
+ unsigned long offset, unsigned long size);
int generic_write_checks(struct file *file, loff_t *pos, size_t *count, int isblk);
extern ssize_t generic_file_aio_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
+extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *,
+ loff_t);
extern ssize_t __generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long,
loff_t *);
+extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *,
+ loff_t *);
extern ssize_t generic_file_aio_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
+extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *,
+ loff_t);
extern ssize_t generic_file_direct_write(struct kiocb *, const struct iovec *,
unsigned long *, loff_t, loff_t *, size_t, size_t);
+extern ssize_t generic_file_direct_write_iter(struct kiocb *, struct iov_iter *,
+ loff_t, loff_t *, size_t);
extern ssize_t generic_file_buffered_write(struct kiocb *, const struct iovec *,
unsigned long, loff_t, loff_t *, size_t, ssize_t);
+extern ssize_t generic_file_buffered_write_iter(struct kiocb *,
+ struct iov_iter *, loff_t, loff_t *, size_t, ssize_t);
extern ssize_t do_sync_read(struct file *filp, char __user *buf, size_t len, loff_t *ppos);
extern ssize_t do_sync_write(struct file *filp, const char __user *buf, size_t len, loff_t *ppos);
extern int generic_segment_checks(const struct iovec *iov,
unsigned long *nr_segs, size_t *count, int access_flags);
/* fs/block_dev.c */
-extern ssize_t blkdev_aio_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos);
+extern ssize_t blkdev_write_iter(struct kiocb *iocb, struct iov_iter *iter,
+ loff_t pos);
extern int blkdev_fsync(struct file *filp, loff_t start, loff_t end,
int datasync);
extern void block_sync_page(struct page *page);
void dio_end_io(struct bio *bio, int error);
ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
- struct block_device *bdev, const struct iovec *iov, loff_t offset,
- unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
- dio_submit_t submit_io, int flags);
+ struct block_device *bdev, struct iov_iter *iter, loff_t offset,
+ get_block_t get_block, dio_iodone_t end_io, dio_submit_t submit_io,
+ int flags);
static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
- struct inode *inode, const struct iovec *iov, loff_t offset,
- unsigned long nr_segs, get_block_t get_block)
+ struct inode *inode, struct iov_iter *iter, loff_t offset,
+ get_block_t get_block)
{
- return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, get_block, NULL, NULL,
+ return __blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iter,
+ offset, get_block, NULL, NULL,
DIO_LOCKING | DIO_SKIP_HOLES);
}
#endif
projects / karo-tx-linux.git / blobdiff